A Heritability Value of 0

question 27

Multiple Choice

A heritability value of 0.997 indicates which of the following?

• A) The majority of the phenotypic variation has a genetic basis.
• B) The majority of the phenotypic variation has an environmental basis.
• C) The trait is polygenic.
• D) There is a significant difference between the two strains.
• E) None of these choices are correct.

---

Definitions:

Synaptogenesis

The generation of synapses or connections between neurons, usually as a result of the growth of axons and dendrites.

Environmental Events

Occurrences in the natural or built environment that can influence the lives of individuals, communities, and ecosystems, such as natural disasters, pollution, and urban development.

Experience-Expectant

Describes neural growth that requires a certain kind of environmental stimulation that is almost certain to occur in the experience of most members of a species. An example is development of the visual system that requires exposure to light in order to occur.

Epigenesis

The control of genetic expression by both regulatory DNA and environmental factors.